<template>

 <el-container class="home-container">
    <!-- 头部布局-->
  <el-header>
   <div>
     <img src="../assets/logo.png" alt=""/>
    <span>电商后台管理系统</span>
   </div>
    <el-button type="info" @click="logout">退出</el-button></el-header>
  <el-container>
   <!-- 侧边栏-->
    <el-aside :width="isCollapse ? '64px' : '200px'">
      <!-- //可折叠菜单区域 -->
        <div class="toogle-button" @click="toogleCollapase">|||</div>
    <!-- 侧边栏菜单区域 -->
       <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF"
    unique-opened :collapse="isCollapse" :collapse-transition="false" router
     :default-active="activePath">
      <!-- 一级菜单-->
            <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
                 <!-- 菜单内容模板区域 -->
              <template slot="title">
            <!-- 图标-->
                <i :class="iconObj[item.id]"></i>
                <span>{{ item.authName }}</span>
              </template>
    <!-- 二级菜单-->
          <el-menu-item :index="'/' + subItem.path"  v-for="subItem in item.children" :key="subItem.id"
 @click="saveNavState('/' + subItem.path)">
             <template slot="title">
          <i class="el-icon-menu"></i>
            <span>{{ subItem.authName }}</span>
         </template>
            </el-menu-item>
            </el-submenu>
          </el-menu>
   </el-aside>
   <!-- 主题内容区域 -->
    <el-main>
        <!-- 路由占位符-->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  data () {
    return {
      // 菜单数据列表
      menuList: [],
      // 一级菜单图标对象
      iconObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      isCollapse: false,
      // 被激活的路由导航地址
      activePath: ''
    }
  },
  // 钩子函数
  created () {
    this.getMenuList()
    // 页面一加载时就获取
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      // 跳转到登录页
      this.$router.push('/login')
    },
    // 获取左侧菜单数据
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.message)
      }
      this.menuList = res.data
    },
    // 控制左侧菜单折叠与拆开
    toogleCollapase () {
      this.isCollapse = !this.isCollapse
    },
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }

}
</script>

<style lang="less" scoped>
    .home-container{
       height: 100%;

  }
   .el-header{
  background-color: #373D41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #FFFFFF;
  font-size: 20px;
  >div{
display: flex;
align-items: center;
  }
  span{
  padding-left: 15px;
  }
}
.el-aside{
    background-color: #333744;
    .el-menu{
     border-right: none;
   }
}
.el-main{
    background-color: #EAEDF1;
}
.iconfont{
   margin-right: 15px;
}
.toogle-button{
     background-color: #4A5064;
   color:#FFFFFF;
   font-size: 10px;
   line-height: 24px;
   text-align: center;
   cursor: pointer;
   letter-spacing: 0.2em;
}
</style>
